<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item><a href="#">权限管理</a></el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="dialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template v-slot="scope">
                        <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[i2 === 0 ? '': 'bdtop','vcenter']">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag v-for="(item3,i3) in item2.children" :key="i3" type="warning" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>

                        <!-- <pre>
                            {{scope.row}}
                        </pre> -->
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template v-slot="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showXiuGai(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeJueSeById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色的对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="dialogVisible"
            width="50%" @close="addDialogClose">
            <!-- 主体内容区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" status-icon>
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addJueSe">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色的对话框 -->
        <el-dialog
            title="修改角色"
            :visible.sync="dialogXiuGaiVisible"
            width="50%" @close="addDialogClose">
            <!-- 主体内容区域 -->
            <el-form :model="editForm" :rules="addFormRules" ref="addFormRef" label-width="100px" status-icon>
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogXiuGaiVisible = false">取 消</el-button>
                <el-button type="primary" @click="editJueSe">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightlist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            // 所有角色的列表数据
            rolelist: [],
            // 添加角色的对话框显示\隐藏
            dialogVisible:false,
            // 修改角色的对话框显示\隐藏
            dialogXiuGaiVisible:false,
            // 分配角色的对话框显示\隐藏
            setRightDialogVisible:false,
            // 添加角色的数据表单
            addForm:{
                roleName:'',
                roleDesc:''
            },
            // 修改角色的数据表单
            editForm:{},
            // 添加用户表单验证规则对象
            addFormRules:{
                roleName:[
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 1, max: 10, message: '角色名长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                roleDesc:[
                    { required: true, message: '请输入角色描述', trigger: 'blur' }
                ]
            },
            // 所有权限的数据
            rightlist:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的节点id值数据
            defKeys:[] ,
            // 即将分配权限的角色id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败！')
            }

            this.rolelist = res.data
            // console.log(this.rolelist)
        },
        // 监听添加用户对话框的关闭事件 重置表单
        addDialogClose(){
            this.$refs.addFormRef.resetFields()
        },
        // 添加新角色
        addJueSe(){
            this.$refs.addFormRef.validate(async (valid) => {
                if(!valid) return
                // 可以发起添加角色的网络请求
                const {data:res} = await this.$http.post('roles',this.addForm)
                if(res.meta.status !== 201){
                    return this.$message.error('添加角色失败!')
                }
                this.$message.success('添加角色成功!')

                this.dialogVisible = false
                // 重新获取角色列表数据
                this.getRolesList()
            })
        },
        // 展示修改角色对话框
        async showXiuGai(id){
            // console.log(id)
            const {data:res} = await this.$http.get('roles/'+id)
            if(res.meta.status!==200){
                return this.$message.error('查询用户信息失败！')
            }

            this.editForm = res.data
            this.dialogXiuGaiVisible = true
        },
        // 提交修改后的信息
        editJueSe(){
            this.$refs.addFormRef.validate(async (valid) => {
                if(!valid) return
                // 可以发起添加角色的网络请求
                const {data:res} = await this.$http.put('roles/' + this.editForm.roleId,{roleName:this.editForm.roleName,roleDesc:this.editForm.roleDesc})
                if(res.meta.status !== 200){
                    return this.$message.error('修改角色失败!')
                }
                this.$message.success('修改角色成功!')

                this.dialogXiuGaiVisible = false
                // 重新获取角色列表数据
                this.getRolesList()
            })
        },
        // 根据ID删除对应的角色信息
        async removeJueSeById(id){
            // console.log(id)
            // 弹框询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => {
                return err
            })
            // console.log(confirmResult)
            // 确认删除返回字符串confirm
            // 取消删除返回字符串cancel

            if(confirmResult !== 'confirm'){
                return this.$message.info('已经取消删除！')
            }

            const {data:res} = await this.$http.delete('roles/' + id)
            if(res.meta.status !== 200){
                return this.$message.error('删除用户失败!')
            }
            this.$message.success('删除用户成功!')
            this.getRolesList()
        },
        // 根据id删除对应权限
        async removeRightById(role,rightId){
            // 弹框提示是否删除
            const confirmResult =  await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)

            if(confirmResult !== 'confirm'){
                return this.$message.info('取消了删除！')
            }

            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200){
                return this.$message.error('删除权限失败！')
            }

            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            // 获取所有权限的数据
            const {data:res} = await this.$http.get('rights/tree')

            if(res.meta.status !== 200){
                return this.$message.error('获取权限数据失败！')
            }

            this.rightlist = res.data
            // console.log(this.rolelist)

            // 递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到数组中
        getLeafKeys(node,arr){
            if(!node.children){
                return arr.push(node.id)
            }

            node.children.forEach(item =>
            this.getLeafKeys(item,arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()]
            // console.log(keys)

            const idstr = keys.join(',')

            const {data:res} =  await this.$http.post(`roles/${this.roleId}/rights`,{rids:idstr})

            if(res.meta.status!== 200){
                return this.$message.error('分配权限失败！')
            }
            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}

.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>